It would be one thing if her becoming unhinged were an isolated incident.
However, it's a regular occurrence for her.
IMO, the use of the race card is going to fracture the Left, eventually someone who's more or less "legitimately" concerned with racisim will realise it's over-use is diluting the term into meaninglessness, and will call the rest of the left out on it.
Of course, they'll be ignored. And identity-politics will prevent these people from ever joining up with the right.